This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 23 |
| 5 | 47 |
| 6 | 191 |
| 7 | 383 |
| 8 | 1439 |
| 9 | 2879 |
| 10 | 11519 |
| 11 | 23039 |
| 12 | 261071 |
| 13 | 1044287 |
| 14 | 2949119 |
| 15 | 31426559 |
| 16 | 194224127 |
| 17 | 1069493759 |
| 18 | 8554807007 |
| 19 | 31337349119 |
| 20 | 68438456063 |
| 21 | 136876912127 |
| 22 | 547507648511 |
| 23 | 8760122376191 |